^^^ We used to love watching that series. Similar was the short lived remake of Upstairs Downstairs, sadly didn't last beyond two seasons, but we were impressed with that also. Then again it seems that most TV stuff with Keeley Hawes in is worthy of watching.
Someone mentioned on here about watching Unforgotten, we watched the first three seasons as they were on TV and we are watching them again, Nicola Walker being great in her lead role. Season 4 is on TV now iirc.
Both the above actresses played in Spooks.
We have also just finished the three seasons of Zapped, on the iPlayer - really fun to watch, only short episodes of around 30 mins each.